package com.vallis.util;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.imageio.ImageIO;

public class WaterMarkUtils {
	/**
     * @param srcImgPath 源图片路径
     * @param tarImgPath 保存的图片路径
     * @param waterMarkContent 水印内容
     * @param markContentColor 水印颜色
     * @param font 水印字体
     */
    public void addWaterMark(String srcImgPath, String tarImgPath, String waterMarkContent,Color markContentColor,Font font) {

        try {
            // 读取原图片信息
            File srcImgFile = new File(srcImgPath);//得到文件
            System.out.println("获取文件成功");
            Image srcImg = ImageIO.read(srcImgFile);//文件转化为图片
            System.out.println("获取图片成功");
            int srcImgWidth = srcImg.getWidth(null);//获取图片的宽
            System.out.println("获取图片宽成功");
            int srcImgHeight = srcImg.getHeight(null);//获取图片的高
            System.out.println("获取图片高成功");
            // 加水印
            BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufImg.createGraphics();
            g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
            g.setColor(markContentColor); //根据图片的背景设置水印颜色
            g.setFont(font);              //设置字体

            //设置水印的坐标
            int x =  getWatermarkLength(waterMarkContent, g);  
            int y =  getWatermarkLength(waterMarkContent, g);  
            g.drawString(waterMarkContent, x, y);  //画出水印
            System.out.println("水印成功！");
            g.dispose();  
            // 输出图片  
            FileOutputStream outImgStream = new FileOutputStream(tarImgPath);  
            ImageIO.write(bufImg, "bmp", outImgStream);
            System.out.println("添加水印完成");  
            outImgStream.flush();  
            outImgStream.close();  

        } catch (Exception e) {
           System.out.println(e);
        }
    }
    public int getWatermarkLength(String waterMarkContent, Graphics2D g) {  
        return g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), 0, waterMarkContent.length());  
    }  
    public static void main(String[] args) {
//    	Font font = new Font("微软雅黑", Font.PLAIN, 35);                     //水印字体
//    	String srcImgPath="E:/sss.jpg"; //源图片地址
//        String tarImgPath="E:/cccc.jpg"; //待存储的地址
//        String waterMarkContent="兹授权_____（微信号）";  //水印内容
//             
//    	
//        new WaterMarkUtils().addWaterMark(srcImgPath, tarImgPath, waterMarkContent, Color.black,font);                         //水印图片色彩以及透明度
//       System.out.println("成功");
    	
    	Date da=new Date();
    	DateFormat aa=new SimpleDateFormat("yyyy-MM-dd");
    	System.out.println(aa.format(da));

    }
}
